namespace CSharpTestDemo._1027;

public class UserTestChild
{
    public  void M1()
    {
        Console.WriteLine("子类实现M1的方法");
    }

    public  void M2()
    {
        Console.WriteLine("子类实现M2的方法");
    }
    public  void M3()
    {
        Console.WriteLine("子类实现M3的方法");
    }
}